How to use the Percentage Calculator
Choose one of three modes using the tabs at the top, then enter your numbers. Results appear instantly as you type — no button needed.
X% of Y — find a percentage of any number (e.g., 20% of 150 = 30).
X is ?% of Y — find what percentage one number is of another (e.g., 30 is 20% of 150).
% Change — find the percentage increase or decrease between two values.
When to use a percentage calculator
Percentages come up constantly in everyday life. This calculator handles all the common cases:
- →Shopping — calculating how much a 30% off sale saves you
- →Grades — finding your score as a percentage of total marks
- →Finance — calculating interest, returns, or commission amounts
- →Statistics — percentage change between survey results or metrics